Spray gun



W- M. SPRENG SPRAY GUN Feb. L @Q49 2 Sheets-Shes?, l

Original Filed June 15', 1940 A H/aRA/Eys W. M.- SEHEN@ Feb i? 211949,

SPRAY GUN 2 Sheets-Shea?. 2

i Original Filed June l5, 1940 Patented Feb. l, 1949 SPRAY GUN WarrenM'. Sprang, Ashland; fOhio, assigner to f The F. E. Myers & Bro.Company,fAshland,

Ghia.' acorporation-of Ohio Original application June 15, 1940, SerialNo. v345,519. 4Divided-and this application August 7, 1942, Serial lN01453,973

is only one grip provided andthat' appears Aat.

the shut-off end, but there is nov provision for adjusting theamount ofshut-olf to: accommodate wear. Neither isA there 'any provision fioradjusting the maximum opening-oi the valve at the shut-off end, or. thetightness with Awhich the valve is clamped on its seat. Y

The entire Weight of the long barrel, assuming that trees are beingsprayed and 'call .for ya 'considerab-le length of barrel, iscarried-:solely: :by the grip atthe shut-off and.' in casesprayzfiuidsof considerable pressure and velocityarebeing handled bythe gun, theuser of therdevi'ce nds the spraying work exhaustive.

Again, in case it is desired t'oclrange the size of the spray in guns ofthe-'unimproved type, it is usually necessary to remove 'the nozzle forthe purpose of replacingthe apertured dise the nozzle by a disc .having.a diierent sizedopening and the work of making this changeI can beaccomplished only while the spray gun. is not in use.

In the parent application case is a division thereis disclosed animproved spray gun in which two lgrips are employed one of the gripsbeing positioned at the end of the' barrel and constituting an improvedtrigger structure and .the other of thegrips is positioned intermediatethe ends of the barrelfwhere it canbe readily held by the handof. theuser. .There-is provided a rsimple and sturdy mechanism'controlled bythe last mentionedhandle for regulating the character of the supply`ejected.bythe nozzle and the barrel. Thus, the Lsupply may becontrolled whileV thegun is in continuous use andthe samevr device thatregulates the spray also serves as a second grip for supporting thebarrel.

The invention covered by this divisional application .is directed moreespecially to the spray end ofthe gun and mechanismvby whichtheintermediately positioned grip handler can control the charactero thespray. y

Other objects and .features..will. be apparent-.as

of which 4the present 3 claims. (ci. a99- 112) 2 the `followingspecifica-tion is perused in connectionwith the accompanying drawings,in which:y

Figure l represents a longitudinal cross-section of the 'complete gun.

Figure 2 `is a fragmentary longitudinal section of the. nozzlein thebarrel, also showing the intermediate grip handle and the mechanism forcontrolling the Asize of the whirl chamber at the nozzle. Thisfigureshows a nozzle in which the whirl chamber is of minimum size.

yFigure 3 .is a View similar to Figure 2 but illustrating theA nozzle ashaving been/moved tov a position to: give the maximum size of opening.

AFigure 4 is a plan view taken along line 4 4 and looking in thedirection of the arrows shown in Figure' 2.

:Figure 5 is a sectional view taken along line 55in lFigure 2.

Figure 6` is a similar view taken along line 6-6 in Figure 3.

Referring more particularly to Figure l, the improved spray gun isconstituted essentially of four main parts, namely, the barrel which isgenerally designated by the reference character l,

4thenozzle indicated 2 and positioned at one end of the. barrel, the.trigger :shut-nii 3 .at the other end of the barrel, and the spraycontrol mechanism 4 positioned intermediate the ends of the barrel..

The barrel i ris made up of as many lengths of piping as-may be desiredand, as indicated, there are Itwo lengths formed by the tubing 5 whichis screwed las. at 6 into the tubing of larger diameter indicated at 1.

The nozzle 2`consists of a head casting or screw cap 8. havingl anhexagonalhead indicated at 9, and a bore 'l0 which tapers down to asmaller opening indicated at ll (Figures 2 and 3). There isa cap|'2:which screws over a small diameter portionof themember 8, this capserving to clamp a .pai-r oi Washers i3, I4 to the right hand end of themember 9. The washer E3 is made of rubber and constitutes a gasket, andthe washer i4 is composed of a hard non-corrosive metal having a verysmall opening I5 through which fluid issues as a spray. Y

The `trigger shut-off 3 may be of any suitable material .butasillustrated is `formedV essentiallyof The latter is also lpro-vided witha stop Kfor-the trigger handie 23; I The lower surface of 'the :handlel'l and the upper surface of the' trigger handle V23 are preferably soshaped `that :when the composite handle is gripped ythe 'twoy sure sothat the flow of the liquid is controlled y by the movements of thetrigger 23. Inasmuch as.

the present invention is not directed especially to the handlemechanism, no further description of this device app-ears necessary ordesirable.

elle end of gun Within the head casting 8 and also extending within thepipe l, there is a whirler mechanism comprising a cylindrical member 50having a countersunk opening 5I at one end and terminating at the otherend in a threaded extension 52. The cylinder 5G is provided with aplurality of angular slots 53 (Figure 6) which conveniently may be sawedinto the Wall of the cylinder.

The threaded end 52 of the member 50 is received in the right hand endof a vane-shaped member, the vanes oi which there may be four, asindicated at 54 in Figure 5, extending throughout most of the length ofthe member. TheV dis.- tance across each pair of Yoppositely disposedvanes is only slighly less than the internal diameter of the barrel l,so that the vanes serve to center the cylinder 5B with respect to the,bore I0. The left hand end of this member terminates in a flat portionindicated at55 (Figures 1 and 4), which is provided with a transverselyextending slot 56. This slot receives a pin 5? extending upwardly from,and integrally secured to a plate 58 which forms a part of a cylindricalstem 59. -Y

The plate 58 rests on the upper surface of a hollow cylindrical member56, which is closedA at the lower end except for an opening throughwhich the cylindrical stern 59 extends. The cylinder 60 is provided withan outwardlyl extending ange 6I and a threaded portion 62 Awhich'isscrewed into an internally threaded boss 63 extending downwardly iromthe pipe or barrel l.

There is a compression spring 54 loosely surrounding the stem 5S andcontained within the cylinder 60, this spring resting on the washer 54'and packing material 65. The'lower ,end lof the stem 5S is received inan opening formed-at the upper surface of a handle grip 66, the setscrew 61 serving to secure the handle 56 to the stem. The handle ishollow, and the lower end is left open in order to drain orf smallamounts of uid which might leak past the under side of the plate 58 andthe washer 64 and through the packing 65. It will be noted in thisconnection that the spring 64 bears downwardly against the packing G5thus tending to maintain the packing in a tight condition and preventingany substantial amounts of iiuid from passing through the handle,66. Y

rOperation of the nozzle and its adjustments through the langular slots53 into the bore IIl` and emerge from the gun at the small opening I5.'75

Thepurpose of the vanes154 is to straighten out 4 the stream, i. e. toeliminate any undesired whirl or eddy current motion within the tube I.

The effect of passing the solution through the angular slots 53 is tocause the stream to be given a rapid whirl so that when the solution isejected at the opening I5 with great vforce, the Solution particlesconstitute a whirling mass, which as will be pointed out hereinafter,may be controlled all the way from a mist form to a coarse straightstream. The amount of the whirl is determined by the angularity andnumber of slots 53, also by the pressure of the fluid in the pipe l. The

degree with which the uid is broken into ne particles, andthe neness ofthese particles, i. e. the state ofthe mist is determined by thedistance that the cylinder 55 penetrates the bore III. As the cylinder5l) is moved to the left, greater quantities of the fluid are permittedto pass Without obstruction into the b ore Il) so that the streamemitted at the opening I 5 is a straight spray with greater carryingpower than a stream in mist form. The cylinder 5U is adjustedlongitudinally by rotating the handle 56, which causes the pin 51 torotate about the axis of the stem 59 and to carry with it the attenedportion 55 of the'vaneshaped member. l

Thus, when the handle 65 is rotated from its position shown in Figure 2,the pin 51 in eiect moves to the left until it reaches its maximum lefthand position, shown in'Fi'gure 3 corresponds to a half revolution turn'of the handle 66.

In the normal operation of the spray gun the user will grip the handle66 with his left hand and the combined trigger 23 and handle I'! withhis right hand,` directing the barrel at the position which itA isdesiredV to ycover with the spray solution, and the handle in the lefthand can be turned giving the exact type of spray that is desired.

It will be understood that the mist form of spray is desirable when thegun is placed close to the plant or tree being sprayed and wide coverageis desired, whereas the coarse or straight form of stream is desiredwhen long throw' is necessary, as when spraying the tops of trees.Consequently, by simply'turning the hand grip 66 through an angle ofless than 180 complete control of the character of the spray is obtainedall the way from a ne mist form to a straight or long distance carryingstream.

In order to reduce the weight of the sprayV gun as much as possible, andto eliminate corrosion, it is desirable' to make most of the parts ofaluminum, by casting. Those parts which areV sub- Y jected to theVgreatest wear, for example, the spray'adjusting mechanism 57, 58, 59and 60 are made of a hard metal, such as brass or bronze.

It will be further evident that there are abso-A and the position of theadjusting handle 66 af` fords a natural and easy position for theoperator to hold the gun, at vthe same time giving the operator a rmgrip on the gun against the recoil resulting-from the discharge of theliquid at high pressures.

While l have explained the improved spray gun from the standpoint ofspraying plants, etc.. itA

will be understood that the gun may be used .for spraying other liquidson other surfaces, such as spraying cold water, paint, or distributingof etching'acids over metal surf-aces.

It will be understood that I desire to comprehend within my inventionsuch modifications as may come within the claims and scope of myinvention.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent, is:

1. A spray gun comprising a barrel, said barrel including a first and asecond length of tubing, said tubing lengths being straight from end toend, means on adjacent ends of said tubing lengths for attaching themtogether in axial alignment whereby to form a straight passagewayinteriorly from end to end of said lengths of tubing and thereby preventturbulence of fluids passing therethrough, said rst length of tubinghaving a nozzle and having a threaded boss 1ocated on its under sideintermediate its ends, a hollow substantially cylindrical memberthreadedly engaging said boss and extending below said rst tubinglength, a rotatable handle grip extending downwardly from said hollowmember and forming a continuation thereof, a stem attached to saidhandle grip and extending upwardly through said member and having anupper end including an offset pin which projects into said first tubinglength, a. rigid rod member extending lengthwise of said first length oftubing and having an aperture at one end engaging said pin and a valvemember at its opposite end, said nozzle having a restricted passagewayadapted to be at least partially closed, or fully closed by rotation ofsaid handle grip, said second length of tubing having a hollow rigidhandle element and a pivoted trigger handle extending downwardlytherefrom and being in the same plane as said rotatable hand grip onsaid rst tubing, and a valve on said second tubing length andoperatively connected to said pivoted trigger handle to control thepassage of fluid from within said handle element to said tubing lengths.

2. A spray gun comprising a barrel, said barrel including a rst and asecond length of tubing, said tubing lengths being straight from end toend, means on adjacent ends of said tubing lengths for attaching themtogether in axial alignment whereby to form a straight passagewayinteriorly from end to end of said lengths of tubing and thereby preventturbulence of fluids passing therethrough, said rst length of tubinghaving a nozzle and having a threaded boss located on its under sideintermediate its ends but positioned adjacent to said means forattaching said tube lengths together, a hollow substantially cylindricalmember threadedly engaging said boss and extending below said firsttubing length, a rotatable handle grip of substantially cylindricalshape extending downwardly from said hollow member and forming acontinuation thereof, a stem attached to said handle grip and extendingupwardly through said member and having an upper end including an oifsetpin which projects into said first tubing length, a rigid rod memberextending lengthwise of said first length of tubing and having anaperture at one end engaging said pin and a valve member at its oppositeend,

said nozzle having a restricted passageway adapted to be at leastpartially closed, or fully closed by rotation of said handle grip, saidsecond length of tubing having a hollow rigid handle element and apivoted trigger handle extending downwardly therefrom and being in thesame plane as said rotatable hand gripl on said first tubing, and avalve on said second tubing length and operatively connected to saidpivoted trigger handle to control the passage of uid from within saidhandle element to said tubing lengths.

3. A spray gun comprising a barrel, said barrel including a first and asecond length of tubing, said tubing lengths being straight from end toend, means on adjacent ends of said tubing lengths for attaching themtogether in axial alignment whereby t0 form a straight passagewayinteriorly from end to end of said lengths of tubing and thereby preventturbulence of fluids passing therethrough, said first length of tubinghaving a nozzle and having a threaded boss located on its under sideintermediate its ends, a hollow substantially cylindrical memberthreadedly engaging said boss and extending below said first tubinglength, a rotatable handle grip extending downwardly from said hollowmember and forming a continuation thereof, a stem attached to saidhandle grip and extending upwardly through said member and having anupper end including an oset pin which projects into said first tubinglength, a rigid rod member extending lengthwise of said first length oftubing and having an aperature at one end engaging said pin and a. valvemember at its opposite end, said nozzle having aA restricted passagewayadapted to be at least partially closed, or fully closed by rotation ofsaid handle grip, said second length of tubing having a hollow rigidhandle element and a valve operator mounted adjacent said rigid handleelement, said rigid handle element and said rotatable hand grip being insubstantially the same plane, and a valve on said second tubing lengthand operatively connected to said trigger handle to control the passageof fluid from within said handle element to said tubing lengths.

WARREN M. SPRENG.

REFERENCES CITED The following references are of record in the rile ofthis patent:

UNITED STATES PATENTS Number Name Date 188,909 Howard Mar. 2.7, 1877259,667 Churchman June 20, 1882 294,675 Richter Mar. 4, 1884 963,969Williams July 12, 1910 1,102,352 Peabody et a1 July 7, 1914 1,180,907Coen Apr. 25, 1916 1,743,370 Messmer Jan. 14, 1930 2,076,753 ThompsonApr. 13, 1937 2,225,759 Strout Dec. 24, 1940 2,238,521 Gustafson Apr.15, 1941 2,362,946 Stockdale Nov. 14, 1944 2,416,719 Stockdale Mar. 4,1947

